Script doing tons of scp jobs.

Hi, I have a working, but extremely user-annoying bash-script, consis- ting of 20-25 scp lines combined with few "ssh hostname 'command'" -type commands. Is there please an easier way to achieve the above scp/ssh jobs without to be asked for the password several (=many) times? I wouldn't like to change ssh's default behaviour for asking pass- word(s), even for root; but started to be very annoyed by my own idea to make such a script to "accelerate" my todos. Please help:) Thanks, Pelibali